2018 Ducati Monster 821Chain slack: 31–33 mmOil: 12 000 km or 1 year (unsure)Valves: 30 000 km
Ducati Monster 821
2018 · EU Market
Reference data for routine maintenance procedures. Always verify against your service manual.
The 2018 Ducati Monster 821 is a middleweight naked bike with a 821cc Testastretta L-twin engine. It offers agile handling, modern electronics, and classic Monster styling, making it a versatile choice for both city riding and spirited weekend rides.
| Size | 520 |
| Slack | 31–33 mm |
| Axle nut torque | 180 Nm (unsure) |
| Chain length | 118 links |
| Sprocket teeth | Front: 15 · Rear: 46 |
| front sprocket nut torque | 186 nm |
| Grade | 15W-50 (API SG+ / JASO MA2) |
| Capacity (with filter) | 3.2 L |
| Filter model | HF153 |
| Coolant | OAT ethylene glycol, silicate-free (unsure) |
| Brake fluid | DOT 4 |
| Clutch fluid | DOT 4 |
| Spark plug | NGK MAR9-J |
| Valve clearance (cold) | Intake: 0.10 mm · Exhaust: 0.15 mm (unsure) |
| Idle speed | 1200 ± 100 rpm (unsure) |
| Front | 120/70 ZR17 · 2.3 bar (solo) 2.5 (with passenger) |
| Rear | 180/60 ZR17 · 2.5 bar (solo) 2.8 (with passenger) |
| Front caliper bolts | 45 Nm (unsure) |
| Oil drain plug | 20 Nm |
| Capacity | 16.5 L |
| Engine oil change | 12 000 km or 1 year (unsure) |
| Valve clearance (Desmo) check | 30 000 km |
| Spark plug replacement | 24 000 km (unsure) |
| Air filter replacement | 24 000 km (unsure) |
| Coolant replacement | 48 000 km or 4 years (unsure) |
| Brake fluid replacement | 2 years |
Disclaimer
- • Specifications may vary by VIN, market variant, and model year.
- • Always consult your owner's manual and service documentation.
- • Use this information at your own risk.